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Fortnite returns to iPhone app store in US, ending exile imposed by Apple
(www.theguardian.com)
This is a most excellent place for technology news and articles.
Yes, apple should allow that, and Sony should allow that. Your "gotcha" seems pretty stupid, because "allow" doesn't mean "facilitate" - it's not Apple's responsibility to make those things work on their devices, but Apple is going out of their way to prevent individuals from making those things happen on their own.